The modern megaliths of North Korea

From a photoessay with about a hundred photos of North Korea, I found the two above to be the most interesting: "The road is prepared for an invasion, the big cubes can be pushed on the road to trap the enemy tanks. Just in case, they put those things up on every road in the radius of 50km from the border, they are often decorated. "

Credit watermarked in the photos, via Reddit.